Oscillators – Solid state active element oscillator – Transistors
Patent
1996-03-29
1997-09-16
Grimm, Siegfried H.
Oscillators
Solid state active element oscillator
Transistors
331143, 331175, H03K 30231
Patent
active
056685084
ABSTRACT:
An oscillating circuit including a capacitor, a charge circuitry and a control circuitry. The charge circuitry includes first and second current generators having respectively first and second current values that are opposite in direction and a switching circuit designed to couple alternately the generators to the capacitor. The control circuitry has a voltage input coupled to the capacitor and an output coupled to control inputs of the switching circuit and includes a comparator with hysteresis having a lower threshold and an upper threshold. The difference between the upper threshold and the lower threshold is chosen to be substantially proportional to the ratio of the product to the sum of the two current values such that the oscillation frequency and the duty cycle do not depend on the supply voltage, the temperature and the process.
REFERENCES:
patent: 4594565 (1986-06-01), Barreras
patent: 4983931 (1991-01-01), Nakano
patent: 5070311 (1991-12-01), Nicolai
patent: 5250914 (1993-10-01), Kondo
Hobrecht, Stephen, "An Intelligent BiCMOS/DMOS Quad 1-A High-Side Switch", IEEE Journal of Solid-State Circuits 25(6):1395-1402, Dec., 1990.
Gariboldi Roberto
Pulvirenti Francesco
Ursino Riccardo
Carlson David V.
Co.Ri.M.Me - Consorzio per la Ricerca sulla Microelettronica nel
Grimm Siegfried H.
SGS--Thomson Microelectronics S.r.l.
LandOfFree
Oscillator circuit having oscillation frequency independent from does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oscillator circuit having oscillation frequency independent from, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oscillator circuit having oscillation frequency independent from will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-221309